PAM8907

Document number: DS43314 Rev. 2 - 2

1 of 10

www.diodes.com

May 2021

© Diodes Incorporated

PAM8907

31VPP OUTPUT PIEZO SOUNDER DRIVER WITH BOOST CONVERTER

Description

Pin Assignments

The PAM8907 is a piezoelectric horn driver with built-in boost

converter, capable of driving a ceramic/piezo sounder with up to

provide an optimized solution with higher Sound Pressure Level

(SPL) for louder output sound, lower quiescent current for longer

standby time, and auto turn-on/off feature for extended operating

lifetime. The PAM8907 provides clear benefits for battery-operated

tracker, piezoelectric horn or alarm related applications.

The PAM8907 integrates a boost converter that operates at a typical

frequency of 1.8MHz. With integrated boost converter and unique

piezo sounder driver technology, the PAM8907 provides small inrush

current, low EMI and yet highly efficient system performance.

PAM8907 Boost converter output can be set to either 11V or 15.6V

with minimum external components for various application usages.

The PAM8907 has built-in automatic shutdown and wake-up

functions for longer operating lifetime requirement. It also features

thermal shutdown protection, over-current protection, over-voltage

protection and under-voltage-lockout protection to assure safe

system operation.

The PAM8907 is available in U-QFN2020-10 package.

Features



Supply Voltage Range from 1.8V to 5.5V







High-Speed Driver Designed with Very Short Turn-On/Turn-Off



No Voltage Cross Output at Shutdown Mode



High Impendence Output at Shutdown Mode



Low Current Consumption, with Shutdown Current < 1

μA



Automatic Shutdown and Wake-Up Control



Available in Space-Saving U-QFN2020-10 package



Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)



Halogen and Antimony Free. “Green” Device (Note 3)



For automotive applications requiring specific change

control (i.e. parts qualified to AEC-Q100/101/200, PPAP

capable, and manufactured in IATF 16949 certified

facilities), please contact us or your local Diodes

representative.

https://www.diodes.com/quality/product-definitions/

U-QFN2020-10

1

2

3

4

5

10

9

8

7

6

VCC

GND

BOOT

SW

VOUT

VIN

VSET

DIN

OUTP

OUTN

(Top View)

Applications



Bluetooth or Wireless Location Tracker



Air Humidifier or Ultrasonic Related Piezo Driver Application



Security Devices, Home Appliances



Haptic Feedback

Typical Applications Circuit

VIN

GND

PAM8907

BOOT SW

1.0

mH

0.1

mF

1

mF

VCC

DIN

1

mF

VOUT

VSET

OUTP

OUTN

PWM input

1.8V to 5.5V

10

mF 1mF

1

9

8

10

3

4

5

7

6

2

Option

Note: Schottky diode is optional. If added, it can save 20% of power

consumption.

Notes:

1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant.

2. See https://www.diodes.com/quality/lead-

free/ for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and

Lead-free.

3. Halogen- and Antimony-

free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and

<1000ppm antimony compounds.